Machine for cutting wire and the insulation thereof



April 8, 19.30- I 1R. J. EMMERT '1,7539561 MACHINE FOR CUTTING WIRE ANDTHE INSULATION THEREOF Filed oct. 29. 1925 2 sheets-sheet 1 R. J. EMMERTApril 8, 1930.

MACHINE FOR/CUTTING WIRE AND THE INSULATION THEREOF Filed Oct, 29. 19252 Sheets-Sheet 2 Patented Apr. 8, 1930 UNITED Vsra'rEs PATENT OFFICEBODGIEB J'. EHMERT, 0l' ANDERSON, INDIANA., ASSIGNOR, BY MESNEASSIGNMENTS, TO DELCO-REMY CORPORATION, OF DAYTON, OHIO, A CORPORATION FDELAWARE MACHINE FOR CUTTING WIRE AND THE INSULATION THEBEOIlApplication mea october ze, 1925. serial No. 65,688.

This invention relates to electrical wiring systems and particularly tothe manufacture of leads or conductors 'comprising a length of insulatedexible wiring having its ends provided with terminal clips to facilitatethe connecting of the wire with terminal posts of different parts ofelectrical equipment. Heretofore it has been the practice to cut thedesired length of insulated cable from a supply reel, then remove aportion of the insulation near the ends of the cable and then secure aterminal clip to the bared end of the cable.

One of the objects of the present invention is to provide a machine forsevering a piece of cable from a supply length, and for simultaneouslycutting the insulation near the adjacent end portions of the cable partswhich have been severed. y

Further objects and advantages of the present invention will be apparentfrom the following description, reference being had to the accompanyingdrawings, wherein a preferred form of embodiment of the presentinvention is clearly shown.

In the drawings:

Figs. 1 and 2 are side and end views, respectively, of the apparatus forsevering the cable and cutting the insulation, the-apparatus being shownin its final operating position.

Fig. 3 is a fra mentary side View of certain parts shown in ig. 1 andshowing the apparatus in position for receiving a length of cable to besevered,and the insulation to be cut.

Figs. 4, 5 and 6 are sectional views taken, respectively, on lines 4-4,5-,5 and 6-6 of Fi 3. i

Fig. 7 is a perspective view showing the nav ture of the operationproduced by the machine upon the work.

The machine comprises a base plate 20 which may be secured to the bed ofa punch press. The base vplate 2O supports pilot posts 22 for guiding amovable plate 23 which is adapted to be attached to the plunger orcrosshead of the punch press. The blocks 20 and 23 support blocks 24 and25, respectively. Block 24 has a rectangular opening 26 having a lengthrepresented by the dimension A in Fig. 1 and a width re resented by thedimension inFig. 2. ithin the recess 26 is ward the left-hand wall ofthe recess, as y shown in Fig. 1, by a clamping screw 33 which issecured in clamping position by nut 34. The parts 28 to 32 inclusive areretained within the recess by a pin 35 which passes throughsuitably-formed, round openings and a halfround groove in the block 24and half-round grooves in each of the members 28 to 32 inclusive. Thisconstruction will be apparent from Fig. 2.

As shown in Figs. 4, 5 and 6, the knife 28 is provided with asemi-circular blade 38; the support 29 is provided with asemi-cylindrical recess 39.; the knife 30 is provided with a V-shapedblade 40; the support 31 is provided with a semi-cylindrical recess 41;and the knife 32 is provided with a semi-circular blade, like the bladeof the knife 28. The knife 28 cooperates with a knife 42 having asemi-circular blade 43. The support 29 cooperates with a splitting knife44 having a wedge-shaped blade 45. The knife 30 cooperates with a knife46 having a V-shaped blade 47. The support 31 cooperates with asplitting knife 48 having a wedge-shaped blade 49. The knife 32cooperates with a knife 50 having a blade similar to that o f knife 43.

The parts 42, 44, 46, 48 and 50 are of substantially the same width asthe parts 28 to 32, and are received within a recess 51 provided in theblock 25. The length of this 'recess is represented by the dimension Cin Fig. 1, and the width by dimension D in Fig. 2. A spacingblock 52 islocated between the upper ends of the parts 42, 44, 46, 48 and 50,

`and these parts are clamped against the lefthand end of the recess 51by a bolt 53 which is secured in clamping position by nut 54. A rod 55similar to the rod -35 .passes through round holes and a half-roundgroove in the block 25 and half-round grooves formed in one side edge ofeach of the parts 42, 44, 46, 48 and 50.

The base 20 and block 24 support a pair of headed rods 60 and\\a pair ofheaded rods 61. Each pair of rods supports and guides a cable-supportingblock 62 which is normally urged against the heads of the rods 60 and 61by springs 63. Each block 62 is provided with an opening 64 forreceiving, as shown in Fig. 3, a portion of an insulated conductor 65.The movement of the upper knives 42, 44, 46, 48 and 50 from the positionshown in Fig. 3 to the position shown in Fig. 1 causes the cable to besevered entirely along the plane of contact of the knives 30 and 46. Theknives 28 and 42 and the knives 32 and 50 cooperate to cut theinsulation of each end of the cable adjacent the ends thereof but not tocut through the conducting portion of the cable. The cut produced bythese pairs of knives is represented in Fig. 7 by the narrow annulargroove 70. The support 29 cooperates with the knife 44 and the support31 with the knife 48 to split the insulation from the groove 70 oppositethe ends of the cable portions. The cut produced by either of the knives44 is represented by the narrow longitudinal groove 71 in Fig. 7. Thesevered end of the cable is indicated by numeral 72. Numerals *l and 65"in Fig. 3 refer to the ends of the portions of wire 65 which have beensevered, have had the insulation cut and from which the insulation hasbeen stripped by a manual operation.

By cutting the cable into desired lengths and simultaneously cutting thecable insulation to facilitate stripping the ends thereof, much time issaved and, therefore, the conducting leads may be manufactured moreeconomically than heretofore.

While the form of embodiment of the present invention as hereindisclosed, constitutes a referred form, it is to be understood thatotlier forms might be adopted, all coming within the scope of the claimswhich follow.

lVhat is claimed is as follows:

l. Apparatus for making electrical conductory leads from a length ofinsulated wire, comprising in combination, yieldingly mounted spacedblocks for supporting the insulated wire therebetween; means for movingthe wire and blocks and adapted to sever the wire between the supportingblocks; and means for piercing the insulation adjacent the point ofseverance to facilitate removal of the insulation.

2. Apparatus for making electrical conductory leads from a length ofinsulated wire, comprising in combination, means for supporting a stripof insulated wire therebetween; and means comprising a plurality ofcutting members simultaneously operable to sever said strip of wirebetween the supporting means and to cut the insulation circumferentiallyand lengthwise Aad]acent both ends of the severed pieces.

3. Apparatus for making electrical conductory leads from a length ofinsulated wire, comprising in combination, spaced yieldably mountedblocks supporting the insulated wire means including knives adaptedconcurrently to sever the -wire between the supporting blocks, tocircuniferentially pierce the insulation near the ends of the severedwire portions, and to pierce one side of the insulation, longitudinallyof the wire, from the line of severance to the line of circumferentialcuts; and means for operating said severing and piercing means.

4. Apparatus for making electrical conductory leads from a length ofinsulated wire, 'comprising in combination, means for severing the Wirecomprising oppositely disposed knife members; a pair of oppositelydisposed piercing members on cach side of the severing means and inspaced relation thereto, said pair of members each being so constructedand arranged as to pierce the insulation of the wire, circumferentiallynear the severed ends thereof; a longitudinal piercing member interposedbetween one knife member of the severing means and each of the corresonding adjacent members of the oppositely isposed piercing membersrespectively so as to lie longitudinally of the wire to be pierced, saidlongitudinal piercing members cutting through the insulation from thepoint of severence to the circumferential cuts therein.

5. Apparatus for making electrical conductory leads from a length ofinsulated Wire, comprising in combination, a base; spaced supportingblocks yieldingly mounted on said base and between which the wire issupported; a plurality of spaced, stationary knives supported on saidbase so as to lie directly beneath the wire when supported by theblocks; a plurality of movable knives directly opposite the stationaryknives and adapted to cooperate with them concurrently to sever the wireand pierce the insulation circumferentially and longitudinally of theWire adjacent the point of severance; and means for operating saidmovable knives.

f 6. Apparatus for making electrical conductory leads from a length ofinsulated wire, comprising in combination, a. base; spaced supportingblocks yieldingly mounted on said base and between which the wire issupported; a plurality of spaced, stationary knives supported on saidbase so as to lie directly beneath the wire when supported by theblocks; a plurality of movable knives directly opposite the stationaryknives and adapted to engage the wire and move it, with the supportingblocks, toward the base whereby the wire will be moved into engagementwith the said stationary knives which will cooperate with the movableknives to sever the wire and pierce the insulation circumferentially andlongitudinally of the wire adjacent the point leo of severance; andmeans for operating said movable knives.

7. Apparatus for making electrical conductory leads from a length ofinsulated wire comprising, in combination, a base; s aced stationaryknives supported on said ase; means yieldingly mounted on the base forsupporting the wire in alignment with said stationary knives apluralityof knives movably 1g supported in operative alignment with thestationary knives, with which said movable knives are adaptedto'cooperate concurrently to sever the wire and to pierce the insulationthereof circumferentially and longitudinally adjacent to and on eachside of the point of severance and means for moving the movable knivestoward the stationary knives. l

8. Apparatus for making electrical conductory leads from a length ofinsulated wire 2o comprising, in combination, a base; spaced stationaryknives carried by said base; blocks slidably supported on upright postsmounted on the base, said blocks having provisions for supporting thewire therebetween in alignment with the stationary knives; springs1nterposed between the base and blocks normally holding said blocks sothat the wire is suspended above the stationary knives; knives movablysupported in spaced, operative a1ignment with the stationary knives withwhich they are adapted to cooperate concurrently to sever the Wire andto pierce the insulation thereof circumferentially and longitudinally ofsaid wire adjacent to and on each side of the point of severance andmeans for moving the movable knives toward the stationary knives wherebysaid movable knives will en` gage the wire and move it and itssupporting blocks toward the base. 40 In testimony whereof I hereuntoaix my signature. i

RDGER J.

